The Antifungal Susceptibility Testing method of the European Committee on Antimicrobial Susceptibility Testing (EUCAST-AFST) is a reference technique for the determination of the Minimum Inhibitory Concentration (MIC) of antifungals for . However, it is time-consuming and requires expertise. Micronaut-AM (M-AM) is a fast, simple, time-saving, and ready-to-use new colorimetric method using an indicator (resazurin) to facilitate the visual reading. The aim of this retrospective study was to evaluate the performance of the M-AM system and compare it with the EUCAST broth microdilution reference method to determine the susceptibility of 77 clinical strains to amphotericin B, itraconazole, voriconazole, and posaconazole. Overall, the essential agreements within ±2 dilutions were 100%, 62%, 58%, and 30% and the categorical agreements were 100%, 97%, 91%, and 87% for amphotericin B, itraconazole, voriconazole, and posaconazole, respectively. No categorical discrepancy was found for amphotericin B, but several categorical discordances were observed with azole antifungals. However, only 2 of the 16 azole-resistant strains confirmed by the sequencing would have been misclassified by M-AM. The use of M-AM is probably suitable for the determination of the MICs of amphotericin B, but further evaluations are needed to confirm its usefulness for the determination of the MICs of azoles for .
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10381152 | PMC |
| http://dx.doi.org/10.3390/jof9070721 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cefiderocol AST in a real-life Klebsiella pneumoniae collection: challenges in the ATU range.
J Antimicrob Chemother
January 2025
Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Carretera de Colmenar Km 9,1. Madrid 28034, Spain.
Objectives: FDC susceptibility testing is challenging as none of the commercial tests have been proven to accurately determine the susceptibility in the area of technical uncertainty (ATU). Here, we evaluated the performance of different FDC testing methods on Klebsiella pneumoniae isolates around this range.
Methods: A challenging collection of 104 K.
[Occurrence of methicillin-resistant Staphylococcus aureus strains at the University Hospital Olomouc].
Klin Mikrobiol Infekc Lek
March 2024
Institute of Microbiology, Faculty of Medicine, Palacky University in Olomouc, Czech Repubic, e-mail:
Objective: This study aimed to evaluate the occurrence of methicillin-resistant Staphylococcus aureus (MRSA) at the University Hospital Olomouc (UHO) over a 10-year period (2013-2022).
Material And Methods: Data was obtained from the ENVIS LIMS laboratory information system (DS Soft, Czech Republic, Olomouc) of the Department of Microbiology, UHO, for the period 1/1/2013-31/12/2022. Standard microbiological procedures using the MALDI-TOF MS system (Biotyper Microflex, Bruker Daltonics) were applied for the identification.
Evaluation of piperacillin-tazobactam disks using contemporary Enterobacterales isolates suggests the need for disk potency optimization.
J Clin Microbiol
January 2025
Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
Unlabelled: Piperacillin-tazobactam (TZP) is a commonly used broad-spectrum agent. OXA-1 β-lactamases drive global Enterobacterales TZP resistance and raise MICs to the clinical breakpoints (8/4-16/4 µg/mL), making susceptibility testing challenging. Two TZP disks are used globally.
View Article and Find Full Text PDFClinical review and drug sensitivity test of complex isolates in non-lactating patients with severe mastitis.
Front Microbiol
December 2024
Department of Laboratory Medicine, Guangdong Provincial Hospital of Chinese Medicine, Zhuhai, China.
Background: Previous microbiological investigations have demonstrated a significant correlation between complex (CKC) infection and mastitis. Recent studies have confirmed the existence of the CKC, with () identified as the primary infectious agent. Examining the incidence of CKC in cases of severe non-lactational mastitis, alongside the clinical characteristics of infected patients, as well as evaluating the drug sensitivity testing protocols for CKC, can provide a more robust foundation for the diagnosis and treatment of CKC infections.
View Article and Find Full Text PDFPrediction of antimicrobial susceptibility of pneumococci based on whole-genome sequencing data: a direct comparison of two genomic tools to conventional antimicrobial susceptibility testing.
J Clin Microbiol
December 2024
Laboratory of Clinical Microbiology, KU Leuven, Department of Microbiology, Immunology and Transplantation, Leuven, Flanders, Belgium.
Determination of antimicrobial resistance (AMR) in pneumococcal isolates is important for surveillance purposes and in a clinical context. Antimicrobial susceptibility testing (AST) of pneumococci is complicated by the need for exact minimal inhibitory concentrations (MICs) of beta-lactam antibiotics. Two next-generation sequencing (NGS) analysis tools have implemented the prediction of AMR in their analysis workflow, including the prediction of MICs: Pathogenwatch (https://pathogen.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!